Is it possible to perform read or write operations without using a transaction?

Yes, read and write operations can be performed without using transactions, but it depends on the context and data integrity requirements.

For example, in simple cases, a single read or write request can be executed without explicitly starting a transaction. In such cases, each operation is considered atomic at the database level.

However, without transactions, it is not possible to guarantee data consistency when performing multiple related operations, as transactions provide atomicity, consistency, isolation, and durability (ACID).

An example in Python using SQLite without an explicit transaction:

import sqlite3
conn = sqlite3.connect('example.db')
cursor = conn.cursor()
cursor.execute("INSERT INTO users (name) VALUES ('Alice')")
conn.commit()  # commit is needed to save changes
conn.close()

Here, a transaction is created automatically when executing the query, but we did not explicitly open it. If commit is not called, changes will not be saved.